Looks like your standard vert feed 2k+ Autococker. I don't know exactly what you plan to do but almost any part will fit (excluding pre2k pump kits, Evo length bolts, and P-blocks). The frame is a CCM J2 frame (some info here). If you need parts for the it, you will need to find the exact parts from CCM. The front pneumatics look like the stock WGP parts, nothing special unless they are something else. I have no idea what the HPR is, it definitely isn't stock. The bolt is delrin which I am not sure was stock for that gun.

You can look up the serial here (serial number is right above where the regulator connects if you don't know): http://cockerdating.tk/. That is just the table of serials I copied off of an archive of the original site it was hosted on. The archive of the site isn't always available for some reason so I made a copy to keep for myself. It's not exact sometimes, especially for older years, but it will get you close enough to the year. Also, I can't guarantee any of those links work in that table.